/******************************************************************************
* The MIT License
* Copyright (c) 2003 Novell Inc.  www.novell.com
* 
* Permission is hereby granted, free of charge, to any person obtaining  a copy
* of this software and associated documentation files (the Software), to deal
* in the Software without restriction, including  without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
* copies of the Software, and to  permit persons to whom the Software is 
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in 
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*******************************************************************************/
//
// Novell.Directory.Ldap.Events.Edir.EventData.GeneralDSEventData.cs
//
// Author:
//   Anil Bhatia (banil@novell.com)
//
// (C) 2003 Novell, Inc (http://www.novell.com)
//

using System.IO;
using System.Text;
using Novell.Directory.Ldap.Asn1;

namespace Novell.Directory.Ldap.Events.Edir.EventData
{
    /// <summary>
    ///     The class represents the data for General DS Events.
    /// </summary>
    public class GeneralDSEventData : BaseEdirEventData
    {
        protected int ds_time;

        public int DSTime
        {
            get { return ds_time; }
        }

        protected int milli_seconds;

        public int MilliSeconds
        {
            get { return milli_seconds; }
        }

        protected int nVerb;

        public int Verb
        {
            get { return nVerb; }
        }

        protected int current_process;

        public int CurrentProcess
        {
            get { return current_process; }
        }

        protected string strPerpetratorDN;

        public string PerpetratorDN
        {
            get { return strPerpetratorDN; }
        }

        protected int[] integer_values;

        public int[] IntegerValues
        {
            get { return integer_values; }
        }

        protected string[] string_values;

        public string[] StringValues
        {
            get { return string_values; }
        }

        public GeneralDSEventData(EdirEventDataType eventDataType, Asn1Object message)
            : base(eventDataType, message)
        {
            var length = new int[1];

            ds_time = getTaggedIntValue(
                (Asn1Tagged) decoder.decode(decodedData, length),
                GeneralEventField.EVT_TAG_GEN_DSTIME);
            milli_seconds = getTaggedIntValue(
                (Asn1Tagged) decoder.decode(decodedData, length),
                GeneralEventField.EVT_TAG_GEN_MILLISEC);

            nVerb = getTaggedIntValue(
                (Asn1Tagged) decoder.decode(decodedData, length),
                GeneralEventField.EVT_TAG_GEN_VERB);
            current_process = getTaggedIntValue(
                (Asn1Tagged) decoder.decode(decodedData, length),
                GeneralEventField.EVT_TAG_GEN_CURRPROC);

            strPerpetratorDN = getTaggedStringValue(
                (Asn1Tagged) decoder.decode(decodedData, length),
                GeneralEventField.EVT_TAG_GEN_PERP);

            var temptaggedvalue =
                (Asn1Tagged) decoder.decode(decodedData, length);

            if (temptaggedvalue.getIdentifier().Tag
                == (int) GeneralEventField.EVT_TAG_GEN_INTEGERS)
            {
                //Integer List.
                var inteseq = getTaggedSequence(temptaggedvalue, GeneralEventField.EVT_TAG_GEN_INTEGERS);
                var intobject = inteseq.toArray();
                integer_values = new int[intobject.Length];

                for (var i = 0; i < intobject.Length; i++)
                {
                    integer_values[i] = ((Asn1Integer) intobject[i]).intValue();
                }

                //second decoding for Strings.
                temptaggedvalue = (Asn1Tagged) decoder.decode(decodedData, length);
            }
            else
            {
                integer_values = null;
            }

            if (temptaggedvalue.getIdentifier().Tag
                == (int) GeneralEventField.EVT_TAG_GEN_STRINGS
                && temptaggedvalue.getIdentifier().Constructed)
            {
                //String values.
                var inteseq =
                    getTaggedSequence(temptaggedvalue, GeneralEventField.EVT_TAG_GEN_STRINGS);
                var stringobject = inteseq.toArray();
                string_values = new string[stringobject.Length];

                for (var i = 0; i < stringobject.Length; i++)
                {
                    string_values[i] =
                        ((Asn1OctetString) stringobject[i]).stringValue();
                }
            }
            else
            {
                string_values = null;
            }

            DataInitDone();
        }

        protected int getTaggedIntValue(Asn1Tagged tagvalue, GeneralEventField tagid)
        {
            var obj = tagvalue.taggedValue();

            if ((int) tagid != tagvalue.getIdentifier().Tag)
            {
                throw new IOException("Unknown Tagged Data");
            }

            var dbytes = SupportClass.ToByteArray(((Asn1OctetString) obj).byteValue());
            var data = new MemoryStream(dbytes);

            var dec = new LBERDecoder();

            var length = dbytes.Length;

            return (int) dec.decodeNumeric(data, length);
        }

        protected string getTaggedStringValue(Asn1Tagged tagvalue, GeneralEventField tagid)
        {
            var obj = tagvalue.taggedValue();

            if ((int) tagid != tagvalue.getIdentifier().Tag)
            {
                throw new IOException("Unknown Tagged Data");
            }

            var dbytes = SupportClass.ToByteArray(((Asn1OctetString) obj).byteValue());
            var data = new MemoryStream(dbytes);

            var dec = new LBERDecoder();

            var length = dbytes.Length;

            return (string) dec.decodeCharacterString(data, length);
        }

        protected Asn1Sequence getTaggedSequence(Asn1Tagged tagvalue, GeneralEventField tagid)
        {
            var obj = tagvalue.taggedValue();

            if ((int) tagid != tagvalue.getIdentifier().Tag)
            {
                throw new IOException("Unknown Tagged Data");
            }

            var dbytes = SupportClass.ToByteArray(((Asn1OctetString) obj).byteValue());
            var data = new MemoryStream(dbytes);

            var dec = new LBERDecoder();
            var length = dbytes.Length;

            return new Asn1Sequence(dec, data, length);
        }

        /// <summary>
        ///     Returns a string representation of the object.
        /// </summary>
        public override string ToString()
        {
            var buf = new StringBuilder();

            buf.Append("[GeneralDSEventData");
            buf.AppendFormat("(DSTime={0})", ds_time);
            buf.AppendFormat("(MilliSeconds={0})", milli_seconds);
            buf.AppendFormat("(verb={0})", nVerb);
            buf.AppendFormat("(currentProcess={0})", current_process);
            buf.AppendFormat("(PerpetartorDN={0})", strPerpetratorDN);
            buf.AppendFormat("(Integer Values={0})", integer_values);
            buf.AppendFormat("(String Values={0})", string_values);
            buf.Append("]");

            return buf.ToString();
        }
    }
}